MIC10951 Micrel MIC10951 V. F. Bargraph and Numeric Display Controller Summary Information*—Not Recommended for New Designs General Description Features The MIC10951 Bargraph and Numeric Display Controller is an LSI general purpose display controller designed to interface to bargraph and numeric displays (vacuum fluorescent or LED). The MIC10951 will drive 16-segment bargraph or 7-segment plus comma and decimal numeric displays with up to 16 display positions. The controller accepts command and data input words on a clocked serial input line. Commands control the on/off duty cycle, starting character position, and number of characters to display. Encoded data words display bargraph position (single segment or increasing bar length), numbers, comma, decimal, and selected upper and lower case letters. No external drive circuitry is required for displays that operate on 20mA of drive current up to 50V. A 64 × 16-bit segment decoder provides character set decoding for the display. • 16 segment drivers plus decimal point and comma tail drivers • 16 digit drivers • Up to 66kHz data rate • Direct digit drive of 20mA for up to 50V displays • Supports vacuum fluorescent or LED displays • Serial data input for 8-bit display and control data words • 64 × 16-bit PLA provides segment decoding driving Any 1 of 16 bargraphs segments 1 to 16 bargraph segments Ten 7-segment numeric characters (0 through 9) Comma and decimal 8 upper and lower case 7-segment characters • Command functions Duty cycle adjust Character position select Number of characters • 40-pin DIP package Micrel has received the rights from Rockwell International to manufacture and market this product and reproduce the specifications, including references to Rockwell. Ordering Information Part Number Block Diagram † Drive Temp. Range Package MIC10951P-40/ MIC10951P-50† 50V 0°C to +70°C 40-pin P-DIP MIC10951PE-40/ MIC10951PE-50† 50V –40°C to +85°C 40-pin P-DIP Dual-marked devices replace both 40V and 50V versions 8 DATA SCLK TIMING AND CONTROL 6 × 16 DISPLAY DATA BUFFER 64 × 16 PLA 2 × 16 DECIMAL POINT COMMA TAIL BUFFER SEGMENT DECODER SEGMENT DRIVERS (ANODE) POR VSS VDD A AD1 AD2 AD3 AD4 AD5 AD6 AD7 AD8 AD9 AD10 AD11 AD12 AD13 AD14 AD15 AD16 DIGIT DRIVERS (GRID) August 1998 * Contact Micrel for more information. 8-25 SGA SGB SGC SGD SGE SGF SGG SGH SGI SGJ SGK SGL SGM SGN SGO SGP PNT TAIL